© 2016 TOBACCO ROOT GEOLOGICAL SOCIETY - Butte, Montana    |    A 501(c)3 non-profit organization

We've been in the field since 1973. Ours is a storied history. Click to read more.

Names and contact information for TRGS Officers, Board of Directors, and current Bylaws.

TRGS welcomes geologists of all stripes. We offer top notch field trips, great networking opportunities, and student scholarships. Join us.

Browse back issues of Northwest Geology and purchase TRGS field guidebooks. Complete your collection!

Keep up with the latest news from the TRGS.